﻿            using System;
            using System.Collections.Generic;
            using System.Linq;
            using System.Text;
            using System.Threading.Tasks;

namespace LinYuan
    {

        class Program
        {
            public int A(int A, int B)
            {
                return A + B;
            }

            public int B(int A, int B)
            {
                return A - B;
            }
            public int C(int A, int B)
            {
                return A * B;
            }
            public int D(int A, int B)
            {
                return A / B;
            }
            public int E(int A, int B)
            {
                return A * A + B * B;
            }
        }
    }